Download 01 - Fairfield Public Schools

Name ______________________________ Class ___________________ Date __________________
Skills Worksheet
Directed Reading A
Section: Newton’s Laws of Motion
1. In 1686, what did Sir Issac Newton explain with his three laws of motion?
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NEWTON’S FIRST LAW OF MOTION
2. What is Newton’s first law of motion?
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3. Which of Newton’s laws of motion describes the motion of an object that has a
net force of 0?
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4. What are two examples of objects at rest?
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5. How could an unbalanced force work on a chair at rest on the floor to make it
slide across the room?
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6. According to Newton’s first law of motion, what will happen to the motion of
objects moving with a certain velocity unless an unbalanced force acts on
them?
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7. If you were in a bumper car that stops when it hit another car, would you
continue to move forward? Why or why not?
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8. What unbalanced force acts to stop a desk that is sliding across a floor?
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Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and Technology
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Forces and Motion
Name ______________________________ Class ___________________ Date __________________
Directed Reading A continued
9. What does friction do to the motion of objects?
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10. What is Newton’s first law sometimes called?
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11. What is the tendency of an object to resist being moved or, if the object is
moving, to resist a change in speed or direction until an outside force acts on
the object?
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12. Why is it easier to change the motion of an object with a large mass than an
object with a small mass?
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NEWTON’S SECOND LAW OF MOTION
13. What is Newton’s second law of motion?
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14. What happens to the acceleration of an object as its mass decreases?
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15. What happens to the acceleration of an object if the force on the object
increases?
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16. Why would a cart start moving faster if you gave it a hard push than if you
gave it a soft push?
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17. In what direction do objects accelerate?
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Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and Technology
6
Forces and Motion
Name ______________________________ Class ___________________ Date __________________
Directed Reading A continued
18. How is the relationship of acceleration (a) to mass (m) and force (F) expressed
mathematically?
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19. Why is an apple easier to accelerate than a watermelon?
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NEWTON’S THIRD LAW OF MOTION
20. What is Newton’s third law of motion?
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21. Explain why Newton’s third law can be stated as “all forces act in pairs.”
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22. What action and reaction forces are present when you are sitting on a chair?
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23. How do action and reaction forces move a swimmer forward in the water?
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24. Since all forces act in pairs, what happens when a force is exerted?
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25. When a ball falls to Earth, why is it hard to see the effect of the reaction force
exerted by the ball on Earth?
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Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor.
Holt Science and Technology
7
Forces and Motion